Means for attaching sheet-steel jackets to cast-iron motor-cylinders, for water-cooling and other purposes



A. MAIRE.

CKETS TO CAST IRON MOTO R CYLINDERS, FOR WATER MEANS FOR ATTACHING SHEETSTEEL JA ]Pwtemed July 6 1921]? ill lift

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urrs!) STATES 'ra nneustrn MAIBE, or ansnnrnnrr, FRANCE, assrenon rosocinrn Lonnarnn nns ancinns nrnnnrssnmnnrs nn nrntraron a sin. ionrinnnvrtnn, or rants,

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males For: ATTACHING snnnrsrnnr Jacnnrs re CAST-IRON iuo'ron-errinrnns,

To all whom it may concern:

a lie it known that 1, Answers MARIE, citizenofthe ltepublic of France,residing at ltoute de Bezons, Argenteuil, Seine and thee, in theRepubllc of France, have invented new and useful. Improvements in havebeen experienced in making light cyl-.

inders with water-cooling jackets.

Water-cooled cylmders made with cast iron ackets are very heavy, and theproblem of attached jackets has been really solved only in the case ofsteel cylinders upon which it is a comparatively easy matter to weld acasing of sheet steel.

This invention has now for its object to provide improved means foraflixing a sheet steel jacket to cast iron cylinders.

My invention obviates the necessity of welding cast iron to steel whichis well known to be a rather difficult operation.

The invention consists substantially in mounting on all the bosses ofthe motor,

. which contain the sparking plugs, valves,

pipes, etc., and also onthe barrel of the cylinder on the side nearestthe gear case, steel. ferrules, rings or collars screwed very tightlyupon sin'faces that have been per fectly worked or machined in such. amanner as to make a tight joint and in leaving around the circumferenceof these ferrules or collars a thinned portlon to form a 11p, and thenfixing the water acket on these lips by. welding steel to steel.

In the case of twin cylinders it is more diliicult to fix the steelcollars upon the barrels of the cylinders, because these collars cannotbe screwed on by reason of the flange that serves to fix the cylindersto the gear case. In such cases, then, an annular rib is cast around thecircumference of each cylinder barrel, and a steel ring of angle sectionhasone ofits flanges fixed in the said cast iron rib by insertion in themold at the time of casting the cast iron rib. The other flange of thissteel ring which projects from the cast iron rib is welded to the steeljacket, as in the preceding case.

Specification of Letters Patent.

FOR WATER-COOLING AND UTI'IER PURPOSES.

Patented July e, man.

i Applicationfiled .Tuly 1a, 1916. Serial No. 109,231.

The collar f may be additionally secured to the barrel of the cylinderby means of rivets m. 1

The manner in which this invention is to be performed will now be moreparticularly described with reference to the accompanying drawings inwhich; a Figure 1 illustrates an example of the application of theimproved process to a motor having separate cylinders.

. Fig; 2 is a detail view of one of the ferrules or collars, showing thethin lip which is to be welded to the jacket.

Figs. 3 and 4; show two ways of effecting the fixing of the steel ringupon the barrel of a cylinder in the case of twin cylinders.

Fig. 5 shows a detail of this steel ring which is designed. tofacilitate the fixing of the latter upon. the cylinder.

Referring to Fig. 1, it will be seen that at the upper part of the motorsteel ferrules or collars a, l), c, c, d, are mounted upon all thebosses required for the fitting of the sparking plugs, valves, pipes,etc. These ferrules or collars are screwed very tightly upon surfaceswhich are perfectly worked so that perfectly tight joints will be madebetween these ferrules or collars and the cylinder. If necessary, thetwo contacting parts may be oxidized with the object of improving thetightness of the joint.

At the lower part of the motor, if it is a hil case of separatecylinders, as in Fig. 1, a

steel collar 7 is screwed upon the barrel of the cylinder.

Each of the ferrules or collars has around its circumference a thinportion Z in the form of a lip, as shown in Fig. 2, to which the sheetsteel jacket 9 is connected by welding. This welding is thus steel tosteel.

in the case of twin cylinders, the flange for fixing the cylinders tothe gear case renders it a difiicult matter to afliX a steel part forreceiving the water jacket.

. its shown in Figs. 3 and l, in such cases, an annular rib is castaround the barrel 2' of the cylinder, a previously prepared steel ring70 or 70 of angle section having been placed in the mold so that one ofthe flanges of this ring is fixed in the rib by the casting operation.In order to improve the union between the cast rib and the steel ring,the

casting may, as shown in Fig. 5, have its inner edge notched like theteeth of a saw as shown at 1, or it may be formed with holes 2; and boththe notches and holes may be employed together. In this manner thesurface of contact between the two metals will be increased, and thesharp points of the steel will be more readily melted by the contact ofthe hot cast metal, so that a perfect ri id union will be secured. b

The steel ring will be made preferably in one of the forms'ic or 70', inorder that the welding with the acket shall be effected more easily atthe edges of the sheet metal ring and the acket. In both cases, theunion between the jacket and the ring is produced by heating the edgesof the two parts.

It is to be understood that the forms and dimensions of the varioussteel ferrules or collars may be varied, as also the details of theirattachment to the cylinder without departing from the nature of theinvention.

Having now described my invention, what I claim 'as new and desire tosecure by Letters Patent is:

1. A cylinder construction for aviation explosion. engines, comprising acast iron cylinder having projecting internally screwthreaded bosses,steel ferrules screwed into said bosses so as to make a perfectly tightjoint therewith, an annularrsteel member secured around the lower end ofthe cylinder and making a tight joint therewith and a steel jacketsurrounding said cylinder and having portions welded to the steelferrules F and the annular steel member respectively.

2. A cylinder construction for aviation explosion engines, comprising acast iron cylinder having projecting internally screwthreaded bosses,steel ferrules screwed into said bosses so as to make a perfectly tightjoint therewith, a steel ring angular in cross section having a serratedand perforated flange embedded in the cast iron cylinder in the castingoperation and. 'a projecting flange, and a steel jacket surrounding saidcylinder and having portions welded to the steel ferrules and to theprojecting flange of the teel ring, respectively.

3. A structure of the character described, comprising a cast iron body,a steel ring angular in cross section having a serrated and perforatedflange embedded in said body by the casting operation and said ringhaving a flange projecting from said body and a steel jacket having itsedge flush with that of the said flange and welded to the edge of theprojecting flange of the ring.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LoUIs Mosrls, CHAS. P. PRESSLY.

